Treatment of mineral and vegetable oils.



invented new and To all whom it may be operated on and the degree offineness to UNITE STATES PATENT orrrcE.

JOHN JAMES HOOD AND ALFIfi-ED SALAHON,

NTS COMPANY, LIMITED,

are THE 011. nnrrumc mrnov pm LAND. i D TREATMENT OF 1,151,523fSpecification of No Drawing. Original application filed concern: Be itknown that we, Joan and ALFRED GORDON SALAMON, subjects of the King ofGreat Britain, both residing at 1 Fcnchurch avenue, London, England,have useful Improvements in the Treatment of Mineral and Vegetable Qils,of which the following is a specificatron.

The object of the invention is to .efiiciently decolorize, and in somecases deoderize, for commercial purposes, crude oil whether mineral oilor vegetable oil, such for instance as cotton seed oil and wood oil, orthe fractionated products thereof. This is efi'ected by ated oil througha material prepared by igniting magnesite (M ihe mineral shou d beground or pulverized to a condition which tests show to be the mostsu'table for the particularfoilto then suificientl'y heated at a dullred heat. Such heating should always be of such duration as to renderthe material substantially anhydrous. lit has been found by experimentthat the greater which the magnesite is ground the better the resultobtained. it is preferable to heat the magnesite to dull rednessprevious to grinding. in order-to obtain the maximum of e ciency of thefiltering material it is desirable to protect it as far as possible fromatmospheric influence after heating until such time as it is broughtinto contact with the oil.

' The eificiency of the magnesite for the aforesaid purpose varies verygreatly with its physical condition as Well as its purity andconsequently in order to secure success it is necessary to proceed bywayof selection, and this can best be eliected by making preliminaryexperiments upon a sma laboratory scale. e to the selection As a guid ofthe magnesite we may say that it should be as free as possible afterignition from lime iron and silica.

lhe amount of oil that can be passed through a given wei ht and volumeof the with the comfiltering, material wil vary mercial requirements inresp of the oil but it is found that satisfactory results can beobtainedby using a series of two or more filtering vessels, and ultimately tam.AND vncnranr-n orns;

Letters Patent.

July 26, 1909,-Serial No. 509,591. Divided Kay 12, 1910. Serial-Ho.560,916,

J AMES Hoon as follows:

' such volume iii from the filters to the still.

ect of the'color ENGLAND, ASSIGNOBS OF GLASGOW, SCOT- 01 LONDON,

Patented Aug. 24,1915 and this application filed using the last or catchvessel as the first vessel of the series, but we do not restrictourselves to this method of employing the material. -We have used adepth of filtering material of four feet in a vessel one foot,1n

diameter. When the material is no longer satisfactory it can generallybe'again fitted for use by driving it out with steam or washing it outwith light petroleum ether according to circumstances and then ignitingfor a suitable time at a dull red heat.

distilling oil the absorbed oil,

In treating thick dark Maid oils, such as the fractions intended foroses or crude cotton seed oil, we proceed The v1sc1d oil is dissolvedina lubricating pursuitable volume of light petroleum spirit, 1

being determined for each particular dark oil experimentally, and thesolution is'passed through the filtering medrum. The proportion'of lightpetroleum spirit to oil may be three volumes of light petroleum spiritto one volume of this may be increased up to say ten volumes of spiritif it be commercially possible as regards cost. The filtering medium isthen washed with such spirit, and the resulting filtrate and washingsdistilled; such distillation may be carried filtrate being run in acontinuous stream The lightspirit so used is collected and may be usedagain for similar purposes.

oil but it is found that generally the lower the r bromin. Withoutattempting to describe boiling point efiiciency, and

. the theory underlying these observations we desire to point out thatas the result .0 experiments a considerable variation is found in theefiiciency of available light spirits and therefore it is necessary tomake a preliminary test of the light spirit by mixing it with the oilto-be treated and passing the mixture through the filtering material.The selection of the light spirit for efiicient use should depend uponthe results thus obtained. I

The application for this fpatent is a division of our application orPatent No. 509,591, filed July 26, 1909 (Patent No 962,840 of June 28,1910) in which we. claim a process of decolorizing oil-which consists-in filtering it through he process herein (1 OllZlIlg Oll vwhich paredby pu the solution heat t renderit anhydrous and distilling thefiltrate.

3. The process herein described of decolorizing oil, which consists infiltering it untii e color is removed through materi'alfmlverizingmagnesite and igm ing it to a dull red'heat'to render it anhydrous bedecolorized.

JOHN JAMEs HOOD. 1 ALFRED GORDON SALAMON.

-Witnesses H. J. LEw1s,- WILLIAM DE VERE MATHEW.

